Several possible causes. Some underarm products can bleach or otherwise cause it; vitilligo; yeast; age etc.
Puberty
Use a trusted hair removal cream ..
Wait for maturity
me
well... try shaving.
In grown hair follicles
Under arm hair
In puberty, hair does not all come at once; often the pubic region is first. Axillary hair (arm pits) will probably come later.
white paint
When they reach puberty - yes.
I THINK I GOT LESS BODY HAIR AFTER I HIT MY 30 Th birthday.
Answer:They make hair dye. Arm hair is hair. Therefore, by deductive resoning, there is dye for arm hair. Dying arm hair is popular in Cambodia and Laos